CIE A2 Chemistry - Use of pencil to draw chemical structures

[SoyCho]

Can i use pencil to draw the structures of chemical?
My chemistry teacher said "No", but some of my friends taught be different teacher told me that i could draw them using pencil.

The same thing happened to graph.
My teacher doesn't allowed us to draw in pencil, all must be drew in pen.

I'm really confused now. >.<
Is there anyone can help me?
Can i use pencil to draw structure and graph?

[Malak]

Can i use pencil to draw the structures of chemical?
My chemistry teacher said "No", but some of my friends taught be different teacher told me that i could draw them using pencil.

The same thing happened to graph.
My teacher doesn't allowed us to draw in pencil, all must be drew in pen.

I'm really confused now. >.<
Is there anyone can help me?
Can i use pencil to draw structure and graph?

For graphs U can do them with pencil but for structures m not so sure, i think pencil is allowed for such stuff but then to be on the safe side you should ask any of your other teachers
or you can ask in the "queries" section..might help